Question 1099411
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At a party, there are c children and a adults.
The ratio of the number of children to adults at the party is c:a.
3 more children and 3 more adults arrive and the ratio is now 2:3.
Then 2 children leave and 2 more adults arrive, and the ratio becomes 1:2.
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{{{system((c+3)/(a+3)=2/3,(c+1)/(a+5)=1/2)}}}



Solve that system for c and a.



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{{{system(a=15,and,c=9)}}}